Method of connecting wires to sleeves



Aug. 5, 1941. c. H. KLEIN METHOD OF CONNECTING WIRES TO SLEEVES FiledJan. 4, 1940 fie] l /a. Z

5&4 I

INVENTOR.

flier/e6 Alcl/Z E 3 ATTORNEY.

. Patented Aug.

UNITED STATES PATENT OFFICE METHOD OF CONNECTING WIRES TO SLEEVESCharles H. Klein, Cleveland, Ohio, assignor to The National TelephoneSupply Company I Application January 4, 1940, Serial No. 312,388

3 Claims.

My invention pertains to a joint between a wire and a metallic sleeveand the method for making same.

Successful compression type splicing sleeves usually have an abrasive tohelp hold the conductor-without necking the wire. See Moore Patent1,827,297 and Breniz'er Patents 1,936,185

and 2,038,535. My proposal is to apply a mixture of a waterproofleadcompound or a binder like shellac or lacquer and a finely dividedabrasive to the wire. The conductor when ready for splicing,

' is coated withjhev mixture and then inserted in the sleeve and thesleeve is compressed by any one of the known arts such. as drawing,rolling or squeezing with a hinge type tool.

An object of my invention is to coat the end or a wire to be anchored ina sleeve with an abrasive to prevent the wire from pulling out oi. thesleeve upon a pulling force being put on the wire with respect to thesleeve.

Another object of my invention is to cover the Other objects and afuller understanding .of my invention may be had by referring to thefollowcompression sleeve showing the wires in position end of a wirewitha binder such; for example. as

shellacor lacquer which contains an abrasive.

Another object of my invention is to waterproof a joint betweena wireand a sleeve by applying a waterproof lead compound binder containing anabrasive to the wire and by inserting the coated wire into the sleeveand compressing same to make the waterproof joint.

Still another object of my invention is to provide for covering the endsof wiresvadapted for insertion into a connecting sleeve by applyingawaterproof lead compound binder which contains an abrasive material andwhich, when the wire is inserted and clamped into the connecting sleeve,establishes a waterproof coating to protect the wires being joined.

A further object of my invention is to provide a lead compound binderfor application to a stranded wire which penetrates the spaces betweenthe strands of the wireto form a waterproof coatingand which contains anabrasive to prevent slippage oi the strands with respect to each otherand to. the compressed sleeve. 7

Still another object of my invention isto proinside the compressionsleeve and before a .com-

pressio'n pressure has been applied to the sleeve. Figure 4 is alongitudinal cross-sectional view showingan abrasively coated strandedcable in a compression sleeve after the sleeve has been compressed aboutthe-cable.

' Figure 5 is a transverse cross-sectional view taken along the line 5-5of Figure 4 showing a stranded cable which has been coated with shellacand an abrasive and squeezed inside the com pression sleeve; and

Figure 6 is a. view similar to Figure 5 showing a strandedcable whichhas been coated with a waterproof lead compound-carrying an abrasive.

In Figure l of the drawing, I have illustrated one embodiment" of myinvention. It consists of wires i0 having their ends covered with abinder such as shellac or a lead compound and an abra-' sive l I whichare inserted into a sleeve 12 which I is intimately compressed upon thewires I!) and ing exerted on the sleeve as is shown in Figures vide abinder containing an abrasive which is thin enough to flow between-thestrandsoi' a wire cable and carry the abrasive-with it.

Another object of my invention is to prevent th slipping of anindividual wire with respect to the other wires in a stranded cable byapplying an abrasive between the individual wires and to prevent theslipping oi! the stranded cable with respect to a clamping sleeve byapplying an abrasive between the cable and the sleeve.

the binder and abrasive II. V V

In order to more fully illustrate the function of the abrasive II onthewire III I have shown the abrasive in cross-section and the wire ll infull side view. By so doing 1- best illustrate the abrasive sticking tothe surface-o1 the wire II as in Figures 21 and 3 and imbedded in thewire I. and the sleeve l2 upon a squeezing pressure be- 1 and 4.Although itis not shown it is to be understood that the abrasive llsubstantially completely encircles the ends of the wire II.

I preferably coat the wires II with the abrasive 4 II as this methodpermits the person such as aiinesman who is connecting the wires II inthe sleeve I! to make a final inspection oi? the abrasive ll beforeinserting'the wires ll into thesleeve l2. The coating of the inside ofthe sleeve II with an abrasive during manufacture renders a finalinspection by the lineman in the-field rather dimcult. A lineslnan maycut the wire ll at the desired point and dip the end oi! the wires wiresl and the abrasive ll.

\ wires is avoided.

to be joined in a container of binding material such as shellac orlacquer into which is mixed an abrasive, or in a container of bindingmaterial such as a waterproofing lead compound into which is mixed anabrasive.- The wires are then inserted, see Figures 2 and 3, into theopen ends of the sleeve l2, until they abut the internal stop I1, afterwhich the sleeve is compressed upon the As illustrated, the compressionmay be done by means of a constant movement clamping tool which makesdepressions I3 in the surface of the sleeve l2 and causes the abrasiveII to dig into both the inside surface of the sleeve l2 and the outsidesurface of the wires ill to provide a firm non-slipping joint betweenthe sleeve and the wires. The non-slipping joint is efiected withoutnecking,the wire Ill. That is, it does not reduce the cross-sectionalarea of the wire l0, and as a result the joint is as strong as the wireitself.

A feature of my invention is the use of 'a binder which carries theabrasive II. A shellac or lacquer may be used which will air dry quicklyinto a semi-fluid or gummysubstance which will "hold the abrasiveparticles asthe wires I0 are beinginserted into the sleeve l2 and whichwill establish a waterproof coating about the wire to prevent theseepage of moisture into the joint, or a lead base compound may be usedto protect the wire and the joint from water damage.

A-further feature of my invention is that the llnesman-may determine thequantity of abrasive and waterproofing material needed for each joint.This is of importance as the presence of abrasive H and the binder tendsto reduce the electrical conductivity between the wires l0 and thesleeve I 2. -A good current conducting joint is highly desirable as wellas a good grip between the sleeve 12' and thewires l0. Therefore, by myinvention, the linesman can apply binder and abrasive over a suflicientlength of the inserted ends of th wire to assure a strong joint andleavea length oi. the wire free from binder and abrasive to establish ajoint which will have a high electrical conductivity. -The applicationof the abrasiveand binder can be varied to accommodate field conditionsand each joint will have the maximum strength and conductivity possible.

The binder and abrasive may be applied to the wires Ill by means of abrush or the wires may be dipped into a container of the mixture.

My invention has great utility when used with a stranded cable I! suchas is shown in Figures 4 and 5. The cable I 4 comprises an inner corezone l5 which may be a single wire or a plurality of wires and an outerconcentric zone l6 which may be a plurality of wires twisted around thecore wire. In'the practice ofmy invention the binder and the abrasive isprovided between the core wire'and the outer wires as well as betweenthe outer wires and the inside of the sleeve, and slippage between theas well as around the entire cable. When a sleeve core wire and theouter I 2 in Figure 4 is compressed around the stranded cable M whichhas been treated with an abrathereby preventing the slippage of any onewire in the outside zone with respect to the others. The abrasive alsoprevents slippage of the outsidewires IS with respect to the sleeve I2.My invention therefore prevents the slipping of the core wire IS withrespect to the sleeve l2. My binder also Waterproofs the joint to'reducedamage by moisture and other damaging elements. My joint is imperviousto moisture and willnot corrode.

Figure 5 illustrates a stranded cable M which has been coated with anabrasive l I mixed in a thin shellac or lacquer and shows how theabrasive H is embedded into the wires of the cable and into the sleeveI2. I

Figure 6 illustrates a. cable' M which has been coated with the abrasivell mixed in a lead compound binder. Eifective waterproofing is providedby the lead compound as substantially all of the spaces between thewires of the cable I! j are filled with the compound and the spacesbeetween the cable l4 and the sleeve l2 are substantially filled with thecompound.

Although I have described my invention with a certain degree ofparticularity, itis understood that the present disclosure has been madeonly by way'of example and that numerous changes in the details ofconstruction may be resorted to without departing from the spirit-andthe scope of the invention as hereinafter claimed.

I claim as my invention: I

end of the wire with an abrasive mixed with an air drying binder,inserting the wire in the open end of a sleeve, and compressing thesleeve upon the abrasive coated wire to embed said abrasive into'saidsleeve and into said wire.

2. The method of making a .joint between a sleeve and'a stranded wirecomprising, coatin and waterproofing the stranded wire with an abrasivemixed in a thin air drying binder which the abrasive between the wiresthemselves and between the wires and the inside of the sleeve.

3.'The method of making a joint between a sleeve and a stranded wirecomprising, coating and waterproofing the stranded wire with an abrasivemixed in a waterproofing compound which penetrates and substantiallyfills the spaces between-the strands of the wire, inserting the wire inthe open end of a sleeve, and compressing the sleeve into intimatecontact with the abrasive coated wires to embed the abrasive between-thewire's themselves and between the wires and the inside of the sleeve.

CHARLES H. KLEIN.

1. The method of making a wire and sleeve' joint which comprises thesteps of coating the

